Excision of the P{SUPor-P} element, resulting in the loss of the y+ and w+ markers. The two ends of the P-element are still present, thus this derivative may well be the result of an internal deletion of the P{SUPor-P} element.
Exo70exc43, mtrmexc43 has female sterile phenotype
Exo70exc43, mtrmexc43 has female sterile | recessive phenotype
The chromosome carrying P{?}exo70exc43 (which causes the exo70exc43 and mtrmexc43 alleles) shows recessive female sterility.